S32 SDKのトピックplain key status bit for the RAM_KEY

plain key status bit for the RAM_KEY

skseofh — Thu, 10 Sep 2020 01:56:02 GMT

Hi!

I'm using s32k144 EVB and I'm studying CSEc module.

In command 'CMD_LOAD_PLAION_KEY' explaination,

there is this phrase, "The command sets the plain key status bit for the RAM_KEY".

Where can I find plain key status bit?

Are there registers that show plain key status?

Re: plain key status bit for the RAM_KEY

skseofh — Thu, 10 Sep 2020 01:57:09 GMT

S32K-RM(page 899)

Re: plain key status bit for the RAM_KEY

lukaszadrapa — Thu, 10 Sep 2020 07:51:33 GMT

Hi,

this flag is required by SHE specification. Each key has several attributes/flags which are hidden for user.

Plain key flag has to be set when key is loaded as a plain RAM_KEY. The flag has to be reset when key is loaded by the secure protocol. The flag is then used to confirm if a key can be exported. Only RAM_KEY can be exported.

Regards,

Lukas